EP 1069101 B1 20031001 - Process for the preparation of C5-/C6-olefins
Title (en)
Process for the preparation of C5-/C6-olefins
Title (de)
Verfahren zur Herstellung von C5-/C6-Olefinen
Title (fr)
Procédé pour la préparation d'oléfines en C5-/C6
Publication
Application
Priority
DE 19932060 A 19990712
Abstract (en)
[origin: EP1069101A1] The production of 5C/6C olefins from a 4C olefin-containing product stream involves disproportionation of 1-, 2- and iso-butene on a Group VIb, VIIb or Sub-Group VIII metal-based catalyst followed by distillation to give a 4-6C fraction which is then distilled to give hexene and methylpentene as a high-boiling fraction. A process (A) for the production of 5C/6C olefins from 4C olefins involves: (a) disproportionation of 1-butene, 2-butene and isobutene in a 4C olefin product stream in presence of a disproportionation catalyst containing Group VIb, VIIb or Sub-Group VIII metal compound(s), to give a mixture of 2-6C olefins and butanes; (b) distillation to give a low-boiling fraction (A) comprising 2-3C olefins or 2-4C olefins and butanes, which is removed, and a high-boiling fraction consisting of 4-6C olefins and butanes; (c) distillation of the high-boiling fraction to give a low-boiling fraction (B; butenes and butanes), a middle fraction (C; pentene and methylbutene) and a high-boiling fraction (D; hexene and methylpentene), and (d) separation of (D) as product, with complete or partial return of fractions (B) and/or (C) to stage (a). An Independent claim is also included for a process (B) for the production of 5C/6C olefins and propene from steam cracker streams or refinery 4C streams, involving: (1) removal of butadiene and acetylenes by optional extraction with a butadiene-selective solvent and subsequent or alternative selective hydrogenation of butadienes and acetylenic impurities in the crude 4C fraction, to give a product containing n-butene and iso-butene; (2) removal of isobutene by reaction of the above product with an alcohol in presence of acid catalyst to give an ether, with separation of the ether and alcohol to give a product containing n-butene and possibly oxygenated impurities, and removal of the ether or re-cleavage for the production of pure isobutene by subsequent distillation with optional separation of entrained 3C, iso-4C and 5C hydrocarbons; (3) removal of oxygenated impurities on suitable adsorbers; and (4) disproportionation of the refined product (II) stream as in stages (a)-(d) above.
IPC 1-7
C07C 11/10; C07C 11/107; C07C 11/06; C07C 7/00; C07C 7/148; C07C 7/177; C07C 7/10
IPC 8 full level
C07B 61/00 (2006.01); C07C 6/04 (2006.01); C07C 7/00 (2006.01); C07C 7/10 (2006.01); C07C 7/148 (2006.01); C07C 7/163 (2006.01); C07C 7/177 (2006.01); C07C 11/06 (2006.01); C07C 11/10 (2006.01); C07C 11/107 (2006.01); C07C 11/113 (2006.01)
CPC (source: EP US)
C07C 7/005 (2013.01 - EP US); C07C 7/10 (2013.01 - EP US); C07C 7/14891 (2013.01 - EP US); C07C 7/163 (2013.01 - EP US); C07C 11/06 (2013.01 - EP US); C07C 11/10 (2013.01 - EP US); C07C 11/107 (2013.01 - EP US); C07C 2521/04 (2013.01 - EP US); C07C 2521/08 (2013.01 - EP US); C07C 2523/36 (2013.01 - EP US); Y02P 20/52 (2015.11 - EP US)
Designated contracting state (EPC)
BE DE ES FR GB NL
DOCDB simple family (publication)
EP 1069101 A1 20010117; EP 1069101 B1 20031001; CA 2313850 A1 20010112; CA 2313850 C 20080603; CN 1213972 C 20050810; CN 1285338 A 20010228; DE 19932060 A1 20010118; DE 50003881 D1 20031106; ES 2208187 T3 20040616; JP 2001072612 A 20010321; MY 127059 A 20061130; TW 527336 B 20030411; US 6538168 B1 20030325
DOCDB simple family (application)
EP 00114104 A 20000710; CA 2313850 A 20000711; CN 00126274 A 20000712; DE 19932060 A 19990712; DE 50003881 T 20000710; ES 00114104 T 20000710; JP 2000207761 A 20000710; MY PI20003176 A 20000711; TW 89113771 A 20000711; US 61094200 A 20000706